Abrasive Sensitivity of Engineering Polymers and a Bio-Composite under Different Abrasive Conditions

Abstract

Two different test systems were designed to evaluate the tribological behavior of five engineering plastics (Polyamide—PA grades and Ultra High Molecular Weight Polyethylene—UHMW-PE) and a fully degradable bio-composite (Polylactic Acid—PLA/hemp fibers) targeted to agricultural machinery abrasive conditions. Pin-on-plate tests were performed with different loads, sliding velocity and abrasive particles. The material response was further investigated in a slurry containing abrasive test system with different sliding velocities and distances, abrasive media compositions and impact angles. The abrasive wear, the change of the 3D surface roughness parameters, the friction force and contact temperature evolution were also analyzed as a function of the materials’ mechanical properties (H,E,σy,σc,εB,σF,σM) and the dimensionless numbers derived from them. Using the IBM SPSS 25 software, multiple linear regression models were used to statistically evaluate the measured data and to examine the sensitivity of the material properties and test system characteristics on the tribological behavior. For both test setups, the system and material characteristics influencing the dependent variables (wear, friction, heat generation) and the dimensionless numbers formed from the material properties were ranked using standardized regression coefficients derived from the regression models. The abrasion sensitivity of the tested materials were evaluated taking into account a wide range of influencing parameters.

Abrasive Sensitivity of Martensitic and a Multi-Phase Steels under Different Abrasive Conditions

“…Let be the number of independent variables then the formulization of such model is where is the dependent variable and are the independent variables. For a more detailed description of such models (in material science as well) see e.g., the authors’ previous paper [ 10 ]. The statistical evaluation of the models was carried out by using IBM SPSS 25.…”

“…The harmonization of environmental and technical requirements is a complex aspect in the selection and development of the applied structural materials. Therefore, in abrasion areas sometimes light and corrosion-resistant polymers [ 10 ] or aluminum alloys are used, even when foamed [ 11 ], but where the presence of mass and strength is essential (e.g., tillage and cultivators), the use of different steels is preferred. Generally, alloyed martensitic steels are utilized in these applications, often with hard alloy coatings to aid the wear resistance [ 12 ].…”

Bio-Degradable Polymer Composites as Abrasive Wear Materials

“…The presented results confirm that the fully biodegradable composite solution may have a role at some practical cases. More details of the abrasive tribological properties can be read in [10].…”

Response Surface Methodology Based Optimization of Test Parameter in Glass Fiber Reinforced Polyamide 66 for Dry Sliding, Tribological Performance

“…Nowadays, many tribological applications are using polyamide and polyamide composites as a better alternative to metallic parts in the manufacturing of the mechanical parts. Weight, cost, and ease of manufacturing are also often considered as additional benefits for using polyamides in composites [ 2 ].…”